Evaporator



G. VINCENT EvAPoRATon Mar. 27, 1923. 1,450,157

Filed Sept. 26, 1922 2` sheets-sheet l Mar. 27, 1923. .1,450,157

G. VINCENT EVAPORATOR Filed Sept. 26, 1922 2 sheets-sheet 2 Patented Mar. 27, 1923.

UNITED STATES PATENT OFFICE.

EVAPORATOR.

Application filed September 26, 1922.

To all whom t may concern.'

Be it known that I, GEORGE VINCENT, a subject of the King of Great Britain, residing at Darlinghurst, Sydney, in the State of New South VVa-les, Commonwealth of Australia, have invented certain new and useful Improvements in Evaporators, of which the following is a specification.

This invention has reference to evaporators employed in different industries for taking up or extracting moisture from articles such as fruit, vegetables, grain, lish, meat, copra, chemicals, leather, and such like. The main object of my invention is to utilize the flue gases to a greater extent than has been possible in existing apparatus.

According to'my invention, the main flue pipe is extended approximately horizont-ally from the furnace or stove, under the drying chamber, to adjacent the opposite end of said chamber. At this point the main fluer pipe is connected to two smaller parallel flue pipes by means of a suitable junction coupling, such as a T pipe, returning the flue gases past the chamber in which the furnace is fixed, said pipes being connected by a bifurcated junction to a vertical flue pipe leading to the atmosphere. In order to overcome the resistance of the horizontal flues, increase the velocity of the flue gases, and ensure proper combustion of' the fuel, I preferably provide an induced draft pipe, air nozzle, or the like adjacent the said bifurcated junction, which is supplied with air under pressure in the heating chamber and discharges such air through the smoke stack.

The air for evaporating purposes is drawn from the atmosphere by means of a centrifugal fan positioned at the ends of the flue pipes situated at the air outlet end of the evaporating chamber and is forced parallel with said pipes forming a plenum or pressure in the enclosure surrounding said pipes and in a heating chamber situated above the furnace. From said heating chamber the heated air passes into the evaporating chamber through a panel or partition having adjustable openings whereby the volume and temperature of the air currents are controlled. The pressure of air in the heating chamber provides the necessary velocity I pressure in the induced draft pipe.

Referring to the accompanying sheet of drawings,

Figure 1 is a plan view of the apparatus with treating chamber removed, while Serial No. 590,660.

Figure 2 isv a sectional elevation of the complete apparatus.

Figure 3 is a sectional plan view on line 3 3, Figure 2.

Figure 4 is a sectional view on line 4 4, Figure 2, on an enlarged scale of the lues and drying chamber, while Figure 5 is a similar viewv on line 5 5, Figure 2, of the furnace and smoke flues.

Figure 6 is a sectional elevation of a modified form of apparatus, and

Fi ure 7, a'sectional plan view on the line 7, Figure 6.

Figure 8 is a cross sectional elevation on the line 8 8, Figure 7.

The same numerals indicate like parts throughout the drawings.

25 is the fan or blower the air from which is forced around the mainflue 12, branch passages 13 and 14 coupling with return flues 9 and 9A positioned in the flue or plenum enclosure or chamber 23. The furnace 10 is in communication with the main flue 12 and its smoke stack 11 is coupled to the branch passages 13, 14. rIhe ends of the tubes 9 and 9A are provided with doors or the like 15 for cleaning purposes kand at their junction with the flue 11, I have an induced draft pipe 11Ay which operates as before stated. 16 is the drying and treating chamber superimposed upon the air heating tubes 12, 9 and 9A. The said chamber is provided with a series of rollers 17 on its floor by which the fruit or other articles being treated are supported on suitable trays or the like (not shown) and fed through the door 18 into the chamber 16, and after passing along same are removed through a door 19 in the side.

The heated air is delivered from the chamber 24 above the furnace into the treating chamber 16 through the panel 20 adjacent the furnace end. This panel is composed of slats each of which is adjustable so as to permit ready alteration of the volume of heated air forced into the treating chamber. The fan or blower 25 is revolved by an engine 2 1 and suitable pulleys and belting 22.

In the modification shown in Figures 6, 7 and 8, 26 is the flue chamber with furnace 27. 28 is a flue pipe leading therefrom, and 29 and 30 are further flue pipes connected to the pipe 28 by branches 31 and 32. 33 and 34 are the blower fans with outlets 35 and 36 respectively. 37 is the smoke stack connected to the flues 29 and 30 by upwardly extending pipes 38 and 39, and 40 is a pipe to cause induced draft to thev stack. 41 is thetreating, chamber open at both ends and through which the materials being treated arel passed on trays or trucks on the rollers 42.4 The heated air, after passing through the chamber 26, is forced into the treating chamber 4l through the perforated plates 43 and 44. Materials to be treated can be passed through from either end, said ends being closable by the doors 45', Further per'- forated plates 46 are placed at the opposite end to the furnace through which.. some of theY heated air passes throughy the treating chamber 41 is again drawn into the fans.

I claim:

l; In an evaporator, a structure forming an evaporating chamber, and; a chamber therebelow, a furnace arranged to heat said evaporating chamber, a` smoke stackv `for the furnace, afiue from the furnace arranged in the chamber below the evapor'ating chamber f and discharging into the smoke stack, and

means to force air to theevaporating chamber through the chamber therebelow and around the exterior of said' flue.l i

2.'In an evaporator, a structure forming ani evaporatin'g chamber, and a chamber therebelow, a furnacel arranged to heat said evaporatin'g chamber, a smoke stack for the furnace, a flue from the furnace arranged Iinl the chamber below the evaporating chamberv and discharging into the smoke stack, and

a blower 'to' force air to the evaporating chamber `through the chamber therebelow and around the eXteriorof said flue. i 3. In an evaporator, a Structure forming *an evaporating chamber, a chamber there below, 4a vchamber at one end of theevaporating chamber, a furnace below the lastnamed chamber, a flue leading from the furnace into and returningfrom the lower chamber, a smoke stack into which saidl flue discharges and the intake portionI of which is arranged in the chamber at the end of the evaporating chamber, and a blower to force air through the lower chamber, around the exterior of saidY flue yand through said end chamber and from thence through the evaporating chamber.

4. ln` an evaporator, a structure forming an evaporating chamber, a chamber therebelow, a chamber at one end of the evaporatin'g chamber, a furnace belowthe last named chamber, a flue leading from the furnace intoy and returningfrom the lower chamber., a smoke-stack into which said flue discharges and the inta-ke portion of which is arranged in theJ chamber at the end of the evaporating chamber, a blower to force airthroughthe lower chamber, around' the exterior of said Hue and through said endl chamber and from thence-through the evap-V orating chamber, and an ,inducedV air draf-t pipe discharging from said en d chamber into said smoke stack.

5. In an evaporator, a structure forming an evaporating chamber, a chamber therebelow, a chamber at one end of the' evaporating chamber, a furnace below the last namedchamber, a flue leading-from the-fur'- nace into and returning from the rlower chamber, a smoke stack into which? said flue discharges and the Aintake portion of whichfis arranged inthe chamber at the end; of the evapor'ating' chamber', a blower to force air through the` lower chamber, aroundy the exterior of said flue and through said' end chamber and from thenceV through the evaporating chamber, and a partition be tween the evaporating chamber andvr said end chamber and having openings for' the passage of airtherethrough.

ln testimony whereof I havehereunto set` my hand.

u GEO-4 uNGEN-'rf 

